BRIED "500" SERIES

Product features:
It may freely rotate by material shrinkage & expansion interference pressing. It can not be pulled out with fine seal performance. It solves the defect of easy drop-out of the external sleeve. It is an updating and upgrading product of hand-tightening chuck. A locking hole is attached to the main body. It is fit for forward-reversal rotation operation. It belongs to a patent commodity.
The appllcable range:
It has been applied in DIY, charging type electric drill.